2617821538 has 16 divisors (see below), whose sum is σ = 3942630720. Its totient is φ = 1303621200.

The previous prime is 2617821491. The next prime is 2617821581. The reversal of 2617821538 is 8351287162.

It is a junction number, because it is equal to n+sod(n) for n = 2617821494 and 2617821503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731293 + ... + 734863.

It is an arithmetic number, because the mean of its divisors is an integer number (246414420).

Almost surely, 2^2617821538 is an apocalyptic number.

2617821538 is a deficient number, since it is larger than the sum of its proper divisors (1324809182).

2617821538 is a wasteful number, since it uses less digits than its factorization.

2617821538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953.

The product of its digits is 161280, while the sum is 43.

The square root of 2617821538 is about 51164.6512545527. The cubic root of 2617821538 is about 1378.2034905431.

The spelling of 2617821538 in words is "two billion, six hundred seventeen million, eight hundred twenty-one thousand, five hundred thirty-eight".